Posted February 6, 2017 4:11 am by Comments

By Hrachya H

Multi-Radial Rifling (MRR) is a special rifling type, which unlike conventional rifling doesn’t have sharp edges. This rifling is described as being made of two different alternating radiuses. Although it is not the polygonal rifling (most notably seen in Glock pistols), it is still very similar in appearance and performance. The multi-radial rifling is pioneered by […]

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Source:: The Firearm Blog

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