- M4 vs. M4A1 Visual Distinctions gt; AR Discussions gt; AR15. COM
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" but is the M4 marked "SAFE-SEMI-BURST"? (reflecting of course the primary difference between the two being the full auto vs 3-round burst capability) Also, on the left magazine housing on the lower receiver, does Colt mark them "M4
- Early M4 Configuration(s) and Unusual M16-Derived Carbines in Military . . .
If you were issued, or encountered, early versions of the M4 in your military service, I have some questions Referencing this promotional video, what was your experience with the M4 configuration (s) s
- What is the difference between m4 feedramps and m4 barrel extension . . .
The M4 barrel extension is the physical part on the barrel as in the photo above M4 feed ramps generally refers to the matching feed ramps cut into the upper receiver More correctly, M4 feed ramps consist of the the extended feed ramps cut in both the extension and the upper
- ar15. com - Your Firearm Resource. (AR-15, AR-10, M4, M16, AK-47, and More!)
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- Battle sight zero for the M4 gt; AR Discussions gt; AR15. COM
An M4 cannot be "battle sighted" The distance clicks on a carry handle are calibrated for a 20" rifle You want a good sight for about to 300 yds, then I would sight in dead on at 50 yds
- Army M4 qualification tips gt; General Discussion gt; AR15. COM
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 center bullseye At 200yds, your bullet is 11" high so you want to be a little low when zeroing otherwise you may shoot over the top of the 175-200m target HTH Good Luck qualifying!
- Barrel life expectancy. . . . the truth! gt; AR Discussions - AR15. COM
Another tells wifey that his barrel is worn out because he really wants a new M4 profile barrel, if you know what I mean Other factors include the type of ammo, how "hot" that ammo is, how often a barrel is cleaned, and many many others
- Official M4A1 USASOC URG-I and NSW URG-I and Clone Picture and . . .
Quote History Originally Posted By joglee: Official part list Geissele Mk16 Geissele ACH DD 14 5" MID-LENGTH CHF BARREL DD MK12 gas block Surefire SF4P Standard M16 M4 BCG Standard M4 receiver Standard M4A1 lower with H2 buffer SOPMOD stock Will be interesting to see who's receiver and BCG the URG is initially issued with
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