Wondering what to add to your holiday list? Chris is running through gun accessories, gear, cleaning equipment, and tools. Brownells will be having a huge Black Friday sale where they offer a percentage off based on how much you purchase.

100-016-825 Vltor IMOD Stock https://goo.gl/nKroXP
100-003-750 Vltor Receiver Extension https://goo.gl/3DHWgt
100-003-185 SAS End Plate https://goo.gl/MvwNq1
452-000-209 JP Enterprises Silent Recoil Spring https://goo.gl/4AWgNC
100-024-307 Radian Arms Raptor Charging Handle https://goo.gl/VdSox9
100-019-321 Aimpoint 3x Magnifier https://goo.gl/EpkPga
100-003-002 Aimpoint Comp 4 https://goo.gl/sRLhso
100-009-823 Centurion Rail System https://goo.gl/C5r1ue
071-000-034 Tango Down Pistol Grip https://goo.gl/SE9Y7U
100-003-742 Arms Folding Front Sight https://goo.gl/iR7P28
100-022-768 FN 16” Barrel https://goo.gl/sHZNMZ
100-003-114 Vltor Flash Suppressor https://goo.gl/Pt8Lre
100-004-042 Vltor Upper Receiver Assembly https://goo.gl/oCACxk
100-024-753 Radian Arms Ambi Lower Receiver https://goo.gl/qNQo3z
100-014-095 Magpul MIAD Grip https://goo.gl/1pzizk
100-013-592 Hiperfire Elite Trigger https://goo.gl/X2BYjy
851-110-016 Smith Enterprise Bolt Carrier Assembly https://goo.gl/xT7sSx
901-000-002 Tank Rifle Shop Extractor Donut https://goo.gl/3oqqkk
100-011-219 Magpul Gen 3 PMag https://goo.gl/oWyBei
851-000-068 Smith Enterprise Armorer Wrench https://goo.gl/heUGuQ
100-003-986 CA Torque, Torque Wrench https://goo.gl/NRs6XZ
133-100-015 Mark Brown Gas Tube Wrench https://goo.gl/pEYcQX
100-000-308 Maglula AR Lula https://goo.gl/MDkuK2
851-000-091 Smith Enterprise Vortex Flash Suppressor https://goo.gl/kryJ2G
635-001-015 Norgon Ambi Magazine Release https://goo.gl/2tYJ8L
939-000-003 Young Manufacturing AR15 Bolt Ejection Tool https://goo.gl/aD4FPk
100-004-875 Gerber Effect Tool https://goo.gl/W2WcMA
100-010-603 Troy Battle Rail https://goo.gl/8y9RuH
471-100-008 Kroil 13oz Can https://goo.gl/wAhkTf

Headphones http://smallarmssolutions.com/1/post/...

Troy Rifles, 5% off at MyServiceRifle.com - Code: SASMSR2017 and 10% off Troy Accessories at Troyind.com - Code: SASTroy2017

Manta Code SAS20 to Save 20% http://www.manta.us/products.php G96 Code SAS10 to Save 10% http://www.mcssl.com/store/c0e84d9548...

Armorer's Manual https://www.amazon.com/Armorers-Manua...
 
 
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When will the M16/M4 be replaced? It's been a popular question looming over the last 50 years or so. It has been attempted numerous times throughout the years through the ACR trials, Individual Carbine, as well as many others. For some reason, in the end, we stay with what we know works. Looking back to World War II, we saw a transformation from semi-automatic combat rifles, and in the post war era we saw the introduction of the intermediate caliber. Towards the end of World War II, we saw iron and wood turn into stamped sheet metal (StG44).

 
 
The Desert Eagle has become iconic because of its star status created in popular movies of our time, with one of most iconic film stars, Arnold Schwarzenegger. It has become one of the most recognized pistols in the world. It was in production for a few years without notice. In Arnold Schwarzenegger’s film, Commando the Desert Eagles is when its fame began. Other Schwarzenegger’s movies such as: Red Heat, Eraser and my favorite, Last Action Hero, would create the demand for this family of pistols.

The Desert Eagle is a large gas operated pistol firing the 357 Magnum, 44 Magnum and the most powerful cartridge in the world to be chambered in a semi-automatic pistol, the .50 Action Express. Although the designers wanted an even larger projectile but the ATF would have classified anything over .50 cal to be considered a destructive device.
 
 
A technical review and test firing of the Robinson Armament XCR-M is available on YouTube. Products mentioned in the video are as follows:

100-025-597 Geissele AR-15 SOPMOD Mount  https://goo.gl/RTYcy2
100-017-237 Sig Sauer Rifle Scope https://goo.gl/GERQik
Manta Rail Covers - Manta Code SAS20 to Save 20% http://www.manta.us/products.php


 
 

A Great Round "If" We Had a Rifle Designed to Shoot It!

We have discussed doing a video on the M855A1 cartridge for quite some time. Looking over all the information it seemed to make more sense to do it in a blog article where it could be articulated better. There are several issues with the new M855A1, none of which are based on the performance of the ammunition. Problems are caused by the pressure it is loaded in and the projectile type, which significantly decreases bolt and barrel life of any firearm it is put into.
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Shown above is a comparison of the M855, M856 Tracer, early M855A1 and the issue M855A1. The difference between the early and issue M855A1 projectile is the plug under the penetrator. Early projectiles used a tin/bismuth alloy. It was found there was not enough mass to it to properly stabilize in the arctic environment so they switched over to copper. Lead has more mass to it than either the tin/bismuth or copper alloy for the same weight. You have to have more copper to get the same weight. You will notice that the M855A1 projectile is just slightly longer.

 
 
Brownells Part Numbers and Product Links:

TOOLS:
230-112-105 Roll Pin Punch Set https://goo.gl/tJWK3B
100-011-315 Geissele Reaction Rod https://goo.gl/M6ityv
018-150-050 1/2 Square Torque Wrench https://goo.gl/gjt6Ur
080-216-014 Barrel Nut Alignment Gauge https://goo.gl/7eKQRB
080-216-011 Pivot Pin Installation Tool  https://goo.gl/PjPuJB
080-685-000 Roll Pin Holder Set https://goo.gl/aMFDY4
080-216-012 Bolt Catch Pin Punch  https://goo.gl/v1KNBZ
851-000-068 Smith Enterprise Armorer Wrench https://goo.gl/heUGuQ

Build Products Used:
100-021-012 AR15 20 A1 Rifle Barrel 1/7 Assy https://goo.gl/Ph99gW
078-101-154 A1 Flash Hider  https://goo.gl/FY7LRK
100-003-639 Bushmaster Lower Parts Kit  https://goo.gl/sTjr3o
430-00-522 Charging Handle  https://goo.gl/E1iMsD
231-000-063 Tear Drop Forward Assist  https://goo.gl/MMzRPh
100-024-755 Luth AR15 A1 Rear Sight Assy  https://goo.gl/QmYogP
430-000-523 Ejection Port Cover Assy  https://goo.gl/cDJZ8D
100-010-658 AR15 Gas Tube  https://goo.gl/Z3D8oZ
078-000-358 Rifle Buffer & Receiver Extension Assy https://goo.gl/xsA8h4
080-001-303 A1 Retro Upper  https://goo.gl/K6XGKz
080-001-304 A1 Blemished Lower  https://goo.gl/YB8yn6
078-000-353 Retro Black Furniture  https://goo.gl/S1h5ye
078-000-347 Retro Pistol Grip Black  https://goo.gl/jyBgd4
078-000-344 Retro Triangular Handguards  https://goo.gl/Uhx2ZH
078-000-350 Retro Black A1 Stock  https://goo.gl/nwWo5g



 
 
Brownells Part Numbers and Product Links:

TOOLS:
080-216-011 Pivot Pin Installation Tool  https://goo.gl/PjPuJB
080-685-000 Roll Pin Holder Set https://goo.gl/aMFDY4
080-216-012 Bolt Catch Pin Punch  https://goo.gl/v1KNBZ
851-000-068 Smith Enterprise Armorer Wrench https://goo.gl/heUGuQ

Build Products Used:
100-021-012 AR15 20 A1 Rifle Barrel 1/7 Assy https://goo.gl/Ph99gW
078-101-154 A1 Flash Hider  https://goo.gl/FY7LRK
100-003-639 Bushmaster Lower Parts Kit  https://goo.gl/sTjr3o
430-00-522 Charging Handle  https://goo.gl/E1iMsD
231-000-063 Tear Drop Forward Assist  https://goo.gl/MMzRPh
100-024-755 Luth AR15 A1 Rear Sight Assy  https://goo.gl/QmYogP
430-000-523 Ejection Port Cover Assy  https://goo.gl/cDJZ8D
100-010-658 AR15 Gas Tube  https://goo.gl/Z3D8oZ
078-000-358 Rifle Buffer & Receiver Extension Assy https://goo.gl/xsA8h4
080-001-303 A1 Retro Upper  https://goo.gl/K6XGKz
080-001-304 A1 Blemished Lower  https://goo.gl/YB8yn6
078-000-353 Retro Black Furniture  https://goo.gl/S1h5ye
078-000-347 Retro Pistol Grip Black  https://goo.gl/jyBgd4
078-000-344 Retro Triangular Handguards  https://goo.gl/Uhx2ZH
078-000-350 Retro Black A1 Stock  https://goo.gl/nwWo5g

All parts are from Brownells https://goo.gl/MZ466Z



 
 
I have been asked on multiple occasions whether I prefer M-Lock or KeyMod rails. My answer has always been that I did not think it mattered. I have always been a Mil-Std-1913 rail fan. All the rifles I have built I have kept the quad Mil-Std-1913 rails. Now you all know how I feel about the term "Picatinny rail". It just down right pisses me off. Picatinny had nothing to do with it, other than to be the project manager. The standardized rails were developed by Richard Swan of Arms, Inc. The correct term is Mil-Std-1913 rail.

I have to say after having a lot of experience with both M-Lock and KeyMod on rifles sent in for evaluation I can now say I have a clear cut opinion. Hands down I prefer the M-Lock. I have had several rifles with KeyMod that I have had extreme difficulty both installing and removing the rail segments. In fact, one was so bad I sent my rail segment back with the rifle because I could not get it off. I had never had that problem with the M-Lock segments. I have received some really cool segments from Kinetic Develop Group that had spring loaded arms. You drop the segment in place, hit two tabs and the arms engage and the segment was as solid as a rock. I also had many of the Keymod segments come loose while firing where I did not with the M-Lock.


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Part 1 of the Brownells retro rifle A1 build is now available on Youtube to watch. Here is a complete part list with links to the products on Brownells website.

Brownells Part Numbers and Product Links:

100-021-012 AR15 20 A1 Rifle Barrel 1/7 Assy  -  https://goo.gl/Ph99gW
078-101-154 A1 Flash Hider -  https://goo.gl/FY7LRK
100-003-639 Bushmaster Lower Parts Kit  -  https://goo.gl/sTjr3o
430-00-522 Charging Handle  -  https://goo.gl/E1iMsD
231-000-063 Tear Drop Forward Assist  -  https://goo.gl/MMzRPh
100-024-755 Luth AR15 A1 Rear Sight Assy. -  https://goo.gl/QmYogP
430-000-523 Ejection Port Cover Assy  -  https://goo.gl/cDJZ8D
100-010-658 AR15 Gas Tube  -  https://goo.gl/Z3D8oZ
078-000-358 Rifle Buffer and Receiver Extension Assy  -  https://goo.gl/xsA8h4
080-001-303 A1 Retro Upper  - https://goo.gl/K6XGKz
080-001-304 A1 Blemished Lower -  https://goo.gl/YB8yn6
078-000-353 Retro Black Furniture -  https://goo.gl/S1h5ye
078-000-347 Retro Pistol Grip Black -  https://goo.gl/jyBgd4
078-000-344 Retro Triangular Handguards - https://goo.gl/Uhx2ZH
078-000-350 Retro Black A1 Stock  -  https://goo.gl/nwWo5g
All parts are from Brownells https://goo.gl/MZ466Z



 
 

A Comparison Between Internal and External Piston Systems

Around the 2004 time period with the introduction of the HKM4 (HK416) the industry as well as the military have been on a kick that somehow the external short or long stroke piston systems were more reliable than the M16/M4 direct gas systems. Well, is it???

I can recall the time when this debate began, the regular Army was very happy with the performance of the M16/M4 series rifles. They were functioning well in both Afghanistan and Iraq. In fact the M4 was so well received that the Army stopped procurement of the M16A2 and A4 in favor of a pure fleet M4 carbine for all ground elements. Reports came back (Soldiers Perspective on Small Arms) that the M4 was the most preferred of all the small arms, and that relatively few had any major issues, not that there weren't criticisms. The top critique was that soldiers wanted a larger caliber cartridge which they felt would increase stopping power. In my opinion, the real problem was the poor performance of the M855 ball cartridge. Other rounds have been proven to be extremely effective such as the Mk262 Mod1 and Mk318 SOST rounds. The Mk262 Mod 1 ammunition is used by SOCOM in MK12, MK18 and M4 carbines. Due to the poor performance of the M855, the Marine Corps have developed and issued the MK318 ammunition. This is a barrier blind projectile which improves the ballistics and performance majorly over the M855.

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    Author

    Technical Specialist, 10 years in forensics, veteran, technical writer and armorer instructor.