Joined Jul 11, 2020. 183;. 4 Posts. Discussion Starter &183; 1 &183; Oct 9, 2020. Only show this user. I have a Ruger Mini 14 and the Serial number starts with 186. My question is can a shoot 5.56 rounds through it The barrel is not stamped either way and the manual that came with the rifle is for serial numbers 181-185. Save. If you are looking for a Mini-14 this is just as nice as any new one you could find and this is made old school Ruger back in 1996, when quality counted not just the number produced. NO TRADES OR OFFERS ACCEPTED. Price 1,000.00 Buy Now. Rifle Caliber .223 Remington. Manufacturer RUGER. Model 1835. Serial Number 195-261XX. Barrel Length 18. These 10 rd magazines work fine and better than off brand models. No problem using 223 or 5.56 ammo in Mini-14 serial numbers beginning with 580 I actually also like the 20 rd mags but these can be illegal in some states. These 10rd mags are easier to extract than the 5 rd Ruger originals. The factory mags are definitely worth it. As the name implies, the Ruger Mini-14 is based on a scaled-down (.223 size) M14 type action, which was itself based on the famous M1 Garand action of WWII and Korea fame. As a result, all critical components of the barreled action are steel. M-1420CF; Model number 5846; Caliber 5.56mm NATO (.223 Remington) Magazine capacity 20 (as. quot;>.