Abstract: A rifle includes a magazine well, a barrel, and an exo-bolt. The barrel is configured to be detachably coupled to the magazine well. The barrel includes a forward barrel portion on an end of the barrel opposite the magazine well. The exo-bolt is configured to travel along an exterior of the barrel.

Abstract: A rifle includes a magazine well, a barrel detachably coupled to the magazine well, and a suppressor detachably coupled to the barrel. The barrel includes a forward barrel portion on an end of the barrel opposite the magazine well. The forward barrel portion includes a muzzle locking mechanism. The suppressor is configured to be retractable.

Abstract: A rifle includes a magazine well and a barrel. The barrel is detachably coupled to the magazine well. The barrel includes a main body and a forward barrel portion. The forward barrel portion includes a bore, a plurality of perpendicular support structures, a plurality of parallel support structures, a channel wall, and a closed channel wall.

Abstract: A rifle includes a magazine well, a barrel detachably coupled to the magazine well, and a suppressor detachably coupled to the barrel. The barrel includes a forward barrel portion on an end of the barrel opposite the magazine well. The forward barrel portion includes a muzzle locking mechanism. The suppressor is configured to be retractable.

Abstract: A rifle includes a magazine well and a barrel. The barrel is detachably coupled to the magazine well. The barrel includes a main body and a forward barrel portion. The forward barrel portion includes a bore, a plurality of perpendicular support structures, a plurality of parallel support structures, a channel wall, and a closed channel wall.

Abstract: A rifle includes a magazine well, a barrel, and an exo-bolt. The barrel is configured to be detachably coupled to the magazine well. The barrel includes a forward barrel portion on an end of the barrel opposite the magazine well. The exo-bolt is configured to travel along an exterior of the barrel.

Abstract: A reticle includes a crosshair, a ranging section, and a targeting section. The ranging section includes a plurality of target height chevrons and a target shoulder width guide. The targeting section includes a plurality of center mass ballistic solution chevrons, a plurality of known length (KL) box shoulder bars, a plurality of KL upper torso bars, a density altitude guide, and a wind compensation guide.

Abstract: A rifle includes a magazine well, a barrel, an exo-bolt, and a rear magazine support. The barrel is detachably coupled to the magazine well. The barrel includes a forward barrel portion on an end of the barrel opposite the magazine well. The exo-bolt is configured to travel along an exterior of the barrel. The rear magazine support is coupled to the magazine well and opposite the barrel. The rear magazine support is configured to come forward toward the barrel and be secured in a plurality of distances from the barrel to adjust a length of the magazine well.