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  1. M4 vs. M4A1 Visual Distinctions > AR Discussions > AR15.COM

    Sep 7, 2008 · Quoted: Can anyone report how a Colt M4 is marked vs. a Colt M4A1 in US service? For example, on the fire selector, I do know the M4A1 is marked "SAFE-SEMI-AUTO" …

  2. ar15.com - Your Firearm Resource. (AR-15, AR-10, M4, M16, AK …

    Firearm Discussion and Resources from AR-15, AK-47, Handguns and more! Buy, Sell, and Trade your Firearms and Gear.

  3. Panzer arms M4 vs Mac 1014 > Shotguns > AR15.COM

    Mar 11, 2024 · Guys, does the Panzer M4 (WALNUT) commnd / worth $150 more then the MAC 1014 also in Walnut?Both being Turk clones I have to wonder what that extra $150 spent on …

  4. Correct Handguards for M4 Clone - AR15.COM

    Nov 7, 2018 · Just about finished an M4gery build. Basic M4 with a carry handle and silent sling. My question is, what plastic drop-in handguard is historically correct for a standard M4 …

  5. Army M4 qualification tips > General Discussion > AR15.COM

    May 1, 2008 · When zeroing the M4 at 25m, set the BDC to 6/3 +2. Make all your elevation changes on the front sight so the BDC will work. Center your group in the lower half of the …

  6. Maybe a dumb question, but what does "Block 1", "Block 2", …

    Jan 5, 2022 · As used for designations? eg, M4[ARCHIVED THREAD] - Maybe a dumb question, but what does "Block 1", "Block 2", "Block 3", etc mean?

  7. OCM5 Help > Silencers > AR15.COM

    Jul 30, 2023 · SPR and M4 collars are two different diameters, you need to make sure that the collar is the correct diameter for your barrel most importantly. That will have a drastic outcome …

  8. A1 upper with or without M4 feed ramps - AR15.COM

    Jun 11, 2025 · A1 upper with or without M4 feed ramps - is it necessary?1st retro build, and all my other upper receivers have had M4 feed ramps. My build is based of a Carbine. I have read …

  9. Official M4A1 USASOC URG-I and NSW URG-I and Clone Picture …

    Jan 7, 2018 · United States Army Special Operations Command (USASOC) Upper Receiver Group, Improved (URG-I) and Naval Special Warfare (NSW) Upper Receiver Group, Improved …

  10. zeroing peq15, peq15a, and peq16 > Lights and Lasers > AR15.COM

    Sep 16, 2017 · Quoted: so our unit went to fire night m4 qual the other night- and it was a disaster. we were looking at conflicting TMs, nobody actually could find any real information …

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