10/20 Magpul Pmag 300 BLACKOUT Gen M3 Magazine

10/20 Magpul PMAG 30 AR 300 B GEN M3  300 Blackout

Caliber: 300 Blackout
Capacity: 10 rounds (in a permanently modified 20 round magazine body)
Color: Black

Optional upgrade: Install Black Ranger Plate (must be added at time of modification)

Modification Details:

• Permanently limited to 10 rounds with our proprietary internal limiter.

• Limiters are chemical and heat resistant — designed never to break or fail.

• Base sealed with industrial-grade polymer adhesive — no rivets or pins.

• Magazine cannot be disassembled without damage.

• Full-length spring remains unrestricted.

About the PMAG 20 AR 300 B GEN M3:

• Purpose-built for 300 Blackout for improved feeding and reliability.

• Unique rib design prevents cross-loading with 5.56 magazines.

• Features next-gen impact- and crush-resistant polymer construction.

• Aggressive texture for secure handling.

• Paint pen dot matrix for easy identification.

⚠️ Note: Impact/dust cover is not included — sold separately.