We have 18" Barrels available for sale, see description below. Also we just got some 4 round factory Bushmaster mags in. We are still waiting on 450 Bolts but should have some in a few weeks. Link to our website and 450 products is available below.
Gryphon Trading 450 Bushmaster 18” Barrel in 416R Stainless Steel.
• Match Grade 416R Stainless Steel Barrel with 1x24" Twist Rate
• Threaded for 11/16"x24 Muzzle Device
• Gas block Diameter 0.750"
• Mid Length Gas System
• Made in USA !
Regards,
Dave
http://www.shop.gryphontradingllc.com/4 ... ter_c6.htm