Main Menu
Newest Members
CRBD, ThegroundedHunts, ikoolu, knyteryder, Tonloc
60066 Registered Users
Top Posters
dogcatcher 76432
stxranchman 51864
RWH24 44568
rifleman 43710
BOBO the Clown 40909
BMD 40537
Big Orn 37484
txshntr 33537
bill oxner 31887
sig226fan ( 30470
Forum Stats
60066 Members
45 Forums
471414 Topics
6184813 Posts

Max Online: 16728 @ 03/25/12 08:51 AM
Topic Options
#5695442 - 04/11/15 07:18 PM AR-15 Gurus - Mil Spec or Commercial Buffer Tubes? Springs? Buffers?
Big Fitz Offline
Pro Tracker

Registered: 12/06/09
Posts: 1987
Loc: McKinney, TX
I am replacing an A2 Stock with a Magpul STR Carbine stock but need to decide if I go with a Mil Spec or Commercial Buffer Tube, which is better and why? Also, what are the best springs and buffers for optimum reliability?

Thanks in advance for the advice.
Originally Posted By: syncerus
I prefer to think of myself as a control enthusiast. wink

#5695530 - 04/11/15 08:33 PM Re: AR-15 Gurus - Mil Spec or Commercial Buffer Tubes? Springs? Buffers? [Re: Big Fitz]
KRoyal Online   sleepy
THF Celebrity

Registered: 01/24/07
Posts: 13465
Loc: Sherman/North of Dallas
The tubes performance wise are the same just the commercial has a little bigger circumference. Springs and buffers depend on gas system and caliber. I like the spikes H2 buffer for 223, but the regular carbine buffers run fine on 16" barreled 223's when you get into SBR's and pistols that's when you might have to toy with the gas system and buffer system. Most springs are all the same, some claim lighter and silent operation, but the regular springs work fine.

If you're talking about LR308/AR10 systems it's a whole other can of worms.

REPR Design

#5695538 - 04/11/15 08:37 PM Re: AR-15 Gurus - Mil Spec or Commercial Buffer Tubes? Springs? Buffers? [Re: Big Fitz]
ebfc Offline

Registered: 06/24/12
Posts: 720
Loc: Dallas
Commercial has the grooves cut into it or pressed into it and the Mil Spec are on the "outside " of the tube so the idea is that it reduces the chance that when you stress the tube you break it off at the threads. There are several charts that show the optimum injection pattern which is something like 3 o'clock but it can run well between 2 o'clock and 5 o'clock as you face forward. So it's not only reliability it's having your system set up so it's optimum to the gas for that load that you use. I agree with the buffer, I like the H2. I run Tubbs flat springs with about a coil cut off.

Edited by EBF (04/11/15 08:40 PM)
Some cause happiness wherever they go; others whenever they go.

Oscar Wilde


© 2004-2016 OUTDOOR SITES NETWORK all rights reserved USA and Worldwide