ProMag AR-308 40rd Polymer Magazine .308 / 7.62 NATO

The ProMag AR-308 40-round polymer magazine is a detachable replacement magazine designed for AR-style rifles that use LR-308 (DPMS) and SR-25 pattern magazines. The body is molded from DuPont Zytel polymer and the follower is injection molded to promote consistent feeding. A spring formed from heat-treated chrome silicon wire provides reliable spring tension; the magazine is finished in black and made in the USA.

Key Specifications

• The capacity is 40 rounds.
• Compatible with LR-308 (DPMS) and SR-25 pattern AR-style rifles.
• Constructed from DuPont Zytel polymer for the magazine body.
• Includes an injection-molded follower to support consistent feeding.
• The spring is formed from heat-treated chrome silicon wire.
• The finish is black.
• This magazine does not fit Armalite pattern rifles.
• Origin is Made in USA.
• Includes 1 magazine.
• The listed weight is .6.

As a durable, high-capacity spare, the ProMag AR-308 40‑round polymer magazine delivers dependable feeding and lightweight handling for range sessions, competition, or routine use. Its robust polymer construction and spring design provide a practical option for shooters seeking a reliable detachable magazine compatible with LR-308 and SR-25 platforms.