ProMag COL27 Standard 10rd 22 LR Fits Colt M4 Black DuPont Zytel Polymer Feeders 40" with production dates of

40" with production dates of 2006 and later

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270 Cal/7mm brass cleaning jag

Equipped with the Tri-Ad locking mechanism the 4-Max Scout has passed every one of our grueling shock and impact tests and then gone on to hold 600 lbs

ProMag COL27 Standard 10rd 22 LR Fits Colt M4 Black DuPont Zytel Polymer Feeders 40" with production dates ofThis replacement or spare magazine is compatible with your Colt M4. It is constructed of DuPont Zytel polymer with injection molded mag follower and mag spring formed from chrome silicone wire. Made in the USA. NOTE: This mag will not work with Ciener and G. I style 22 conversion rifles.