The M4-22 PRO Rifles by Tippmann Arms elevate the .22 caliber AR-15 platform by incorporating M4-inspired looks with the industry's leading performance. Much of it is mil-spec-from the aluminum upper to the lower receiver-so compatibility is wide for most AR-15 stocks, handguards, and sights for great personalization. Equipped with a 16" 4150 solid steel barrel, a nickel-plated bolt for added reliability, and featuring adjustable flip-up sights, this is an excellent base gun for both professiona