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(R)ailed(S)tock(A)dapter(4.5)mm Folding Rear Trunnion

The RSA-4.5 allows you to add a section of 1913 rail to the rear of any folding trunnion that utilizes the 4.5mm pin common with many Bulgarian and PSA firearms. This 1913 rail section allows you to attach 1913 compatible stocks/braces to your firearm, including any of our stocks/braces with the 1913 Folding Mechanism. 

• Fit's folding trunnions with 4.5mm pin
• Black hardcoat anodized finish
• Made in the USA

REPLACEMENT PIN IS RECOMMENDED CAN BE PURCHASED HERE

*MAY REQUIRE FITTING WHEN USED IN CONJUNCTION WITH SOME PSA 4.5MM TRUNNIONS.

Attaching a stock to a pistol makes it an SBR and requires NFA approval. You are responsible for knowing and following your local/state/federal laws!

JMac Customs LLC is not responsible for the end users misuse of our products.