Aug 14, 2013 · I carry a M4A1 at work with the KAC 7" rail on it. I have a duplicate upper at home to train on but much prefer my other rifles, all BCM uppers (16" w Centurion 12" rail, it’s longer than I …

Feb 11, 2013 · In this thread, I wanna talk about a little known M4A1 varient, (that I’m not actually sure even recieved an official designation) known as M4A1 GL/SSC. All the information I have is that it …

Mar 22, 2011 · I’m talking about a Colt 6921 vs. an M4A1, or even the same M4A1 firing on auto vs. firing on semi, so there is no variation in weapons setup. Is a single cycle of the bolt faster on auto …

Jan 30, 2010 · I bought a Colt M4 flat top upper to swap out for the A2 upper on my 6520. What size front sight post do I need, since the FSB on the 6520 is not “F” marked? Can I just swap out an entire …

Feb 9, 2026 · 3 Position Arizona Regulator in an M4A1 style AR-15 2cool4school Jan 29, 2026 Replies 7 Views 138 Tuesday at 9:55 PM

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As a LEO and an avid airsoft player, I find the airsoft replica’s to be a huge asset to my training, both personal and professional. While they have their limits in range, most of them (if you bought the …

YHM Turbo T2 Looks like YHM has released their much speculated update to the Turbo, adding a flash hider cap and 1.375-24 universal threading like that on the Turbo K.

I suppose it depends on the gas port size. Modern 16" Colt barrels run a .0625" gas port. I have one 11.5" barrel with a .063" BRT Micro Port and it will run 5.56 spec ammo unsuppressed.

Jul 30, 2010 · If you had to walk out of your front door right now and not come back for a while, what rifle would you take? This could be for whatever reason you can think of but whatever that reason, you …