A 25-rd magazine for the AR-15, 9mm SMG configuration carbine. The magazine body is constructed of heat-treated steel, and finished in a black-phosphate. The follower is constructed of a proprietary DuPont® Zytel™ based polymer to ensure a long service life. The springs are made from heat treated Chrome-silicon wire for increased reliability and smooth feeding.
ProMag magazine bodies are constructed of high carbon heat-treated steel and TIG-welded for strength. The springs are precision wound using heat-treated chrome silicon wire. Bases and followers are injection molded from polymers selected for their durability. The result is quality, consistency, durability and reliability.
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These are very smooth mags! Function well with no problems. For its price range it deserves 5 Stars! Fast shipping and service too.
Great product and well built .. Fast shipping thanks again ..