Sako Oy

Yamamotor Finland Oy

Juha Aalto

Kari Kuparinen

Henry Paasikivi

Otto Manninen

A firearm which is modifiable by the user such that a firearm barrel is arranged replaceable by the user, wherein the firearm comprises a barrel unit, which is detachable by the user and fastenable to a receiver, which barrel unit comprises the barrel and a locking piece, wherein the locking piece has a backward narrowing rear cone, which fits a cone in the receiver and which has a forward narrowing front cone, and which fits a cone in the centering bush, wherein to the centering bush is rotatably connected a clamping bush having an outer thread which fits an inner thread in the receiver, wherein by rotating the clamping bush in the locked direction, the rear end of the locking piece is centerable by means of the rear cone and lockable to the cone in the receiver.

Firearm and firearm system

A rifle with a replaceable barrel with two or more barrels for different purposes and calibers and with own magazines for different cartridges. At least one barrel () has the cavity (), into which a projection or upper edge () in the cartridge magazine () corresponding to the barrel fits, when the right magazine has been inserted into the rifle.

Rifle having a replaceable barrel

A cartridge magazine for firearms has an elongated channel to receive a plurality of cartridges. The cartridge magazine has a box forming a housing of the cartridge magazine, a spring operated follower for pressing the cartridges in the magazine to an upper position. In this position, the topmost cartridge is ready for feeding into a chamber of the firearm and in this position the topmost cartridge rests against a pair of retaining lips. The lips remain in a first position when the topmost cartridge is in the upper position and the lips are operatively displaceable to a second position wider than the first position.

Cartridge magazine for firearms

A system for fastening the barrel () of a rifle with a replaceable barrel, the system consisting of a lock frame (), into which the barrel socket () can be inserted into position and locked by a bolting device. The bolting device consists of a barrel block stop () provided at the top of the lock frame (), a groove () in the barrel socket being insertable into the block stop when the barrel is clamped into locked position.

System for fastening the barrel of a rifle having a replaceable barrel

A breech device for bolt-action firearms includes a breech body reciprocating in the receiver and rotatable into locking position. In its front part, the breech body has locking lugs located in three sectors, the locking lugs in at least two sectors being formed in a breech device equipped with a magazine loaded in parallel so that there are four guide surfaces to limit rotation between the receiver and the breech body, and the breech body has a recessed locking surface for the cartridge at its end. The locking surface of the cartridge has been extended downwardly to form a glide surface passing between the locking lugs so that the rear surface of the cartridge case slides on the glide surface and the locking surface into locking position as the cartridge is ejected from the magazine into the cartridge housing.

Growing community of inventors

Riihimäki, Finland

Juha Aalto