yes they are but it looks better with p-mags
Helps you change mags faster.
Both are good and viable options. Before you buy the PMags, however, be certain they'll fit into the magazine well... some lowers have problems with this. With the USGI mags, on top of the Magpul follower, I also recommend replacing the magazine spring with a sturdier, braided spring.
It depends on which companies make the m4 you have, but generally companies stick to the same dimentions for magazines for the m4/m16 family.
At the back of the floor plate, there's a section which curves upwards. You get a small slotted screwdriver (or similar device) between that and the magazine body, and - using the magazine body as a fulcrum - simply pull the floor plate towards the rear of the magazine. This is for the GI and GI style magazines, mind you, and won't work on H&K mags, Magpul P-Mags, etc.
Companies such as Cheap Mags, Best Deal Mag, Thrifty Mags, Value Mags, and Discount Mags all offer cheap mags. These companies specialize in this business, and have the best deals.
Cro-Mags was created in 1981.
No. The mags for the 9mm are different than the mags for a .40 S&W
30 in Standard mags 40 in Extended mags 75 in Drum mags those were the common mags, there are also custom 60 round mags that look like 2 standard ones back to back that form a half-circle shape
9bkr iz da best class at mags.
Mags Darcy was born on 1986-12-02.
Mags L Halliday was born in 1971.