TPD AXR rifle (USA)

Type / action	gas operated, rotating bolt
Caliber(s)	5.56x45 mm / .223 Rem, also 6.8x43 mm Rem SPC
Weight unloaded	3.2 kg
Length	667 mm / 26.25" (with 406 mm / 16" barrel)
Barrel length	406 mm / 16" or 457 mm / 18"
Magazine capacity	30 rounds standard, any M16/Ar15 compatible magazine will fit

The AXR (Advanced eXtensible Rifle) weapon was developed by US-based company Tactical Product Design (TPD) Inc. The AXR is based on the famous Austrian Steyr AUG assault rifle. Manufacture of this clone became possible because original patents for Steyr AUG have expired, and the demand for civilian version of this weapon in USA was not covered by import of original Austrian-made rifles. TPD designers created a faithful copy of Steyr AUG, so most parts are interchangeable between the AXR and AUG.Prime differences between AXR and its prototype are in materials (TPD claims to use most modern metals and polymers in its design, which are superior to those available 30 years ago in original Steyr rifle) and use of STANAG / M16 type magazines rather than proprietary magazines. Optional caliber conversion kit allows to upgrade the AXR from 5.56mm / .223 to more potent 6.8mm Rem SPC caliber. At the present time AXR is offered only in semi-automatic version, for civilian and police use.

TPD AXR rifle (USA)

TPD AXR rifle is gas-operated semi-automatic weapon of bullpup configuration. The receiver is made from aluminum alloy, the stock / housing is made from impact-resistant polymer. Barrels are quick-detachable, with barrel lock incorporated into the gas block / forward grip base. Adjustable gas system features short-stroke gas piston, located to the right of the barrel. Bolt group rides on dual guide rods, and different user-replaceable multi-lug rotary bolts are available for right- or left-hand ejection. It must be noted that current polymer stocks of AXR rifle does not permit easy change of the ejection direction, as ejection port is made only on one side of the stock. AXR is equipped with bolt hold-open device; bolt catch can be deactivated by pulling the charging handle. The original Steyr AUG-type bolt closure device is incorporated into the design, in the form of the button on the charging handle. Normally non-reciprocating charging handle is located also on the left side, in front of the receiver; push on the button locks the handle to the bolt group, allowing to use it for manual bolt closing. AXR rifle accepts any M16 / Ar15-type magazines; magazine release buttons are located below the stock, behind the magazine housing, and on the left side of the stock, above the magazine. Manual safety is of cross-bolt button style, located above the pistol grip. No sights are installed by default on AXR rifle; instated, each rifle is equipped with Picatinny-type rail on the top of receiver, which permits installation of any type of sighting equipment using appropriate mountings.

Bushmaster M-17s rifle (USA)

Bushmaster M-17s rifle, right side view, with installed Red Dot sight

Buy Bushmaster rifles, parts and accessories at Impact Guns online store

Caliber: 5.56x45 mm (.223 Remington)
Action: Gas operated, rotating bolt
Overall length: 760 mm
Barrel length: 546 mm
Weight: 3.72 kg empty
Magazine capacity: Accepts all M16/AR15 magazines, standard capacity 30 rounds

This interesting weapon started its life in around 1982, when a small Australian company Armstech decided to develop a new assault rifle for Australian army trials. Prototype weapons were produced in a very short amount of time, but Australian army eventually selected for adoption an already established foreign weapon, the Austrian-made Steyr AUG. Nevertheless, Armstech kept developing and produced a series of interesting weapons, all in bullpup layout (and some firing caseless ammunition of indigenous design), but neither went past prototype stage. In around 1990 Armstech went belly up, and rights to the rifle that fired conventional ammunition was sold to another Australian company, known as Edenpine. Further development at Edenpine resulted in SAK 30 prototype, but company found that there's no market for such weapon in peaceful Australia. Therefore, in early 1990s Edenpine found an American company, Bushmaster Firearms Inc, which finalized the prototype and put it into production in 1994, just before the infamous "Assault weapons ban". Bushmaster designated new rifle as M17s and produced it in somewhat limited numbers up until 2005, when it was dropped from Bushmaster products line. It must be noted that demise of Bushmaster M17s was caused mostly by general preferences of American gun market, which is rather shy on bullpups; therefore, Bushmaster company decided to concentrate on much better selling rifles, patterned after Ar-15 / M16 or M4.
The M17s is a self-loading rifle, and thus cannot be classified as a true "assault rifle". Nevertheless it could make a very good paramilitary of home defense weapon; it is also good plinker and all-around compact rifle in .223 caliber, combining rifle-length barrel with carbine-style short overall length.

Bushmaster M-17s rifle (USA)

The M17s rifle is gas operated weapon that uses short-stroke gas piston, located above the barrel. Locking is achieved by rotary bolt with seven lugs; bolt is hosted in massive Ar-18-style bolt carrier, which rides on dual guide rods. The charging handle is somewhat unusual as it forms the rear part of the integral carrying handle, and therefore it is fully ambidextrous. The cocking handle slot on the top of receiver is covered by sliding dust cover. The receiver of weapon is a composite affair, consisting of extruded aluminum upper part and polymer lower part. Upper part houses barrel, gas system and bolt group. Lower receiver is made integral with pistol grip and houses trigger unit and magazine housing. Upper and lower receivers are connected by two push-out cross-pins. Ejection port is made on the right side of the weapon only, and there's no provisions for left-hand ejection. Nevertheless, weapon is more or less ambidextrous in regard to controls, as push-button safety (located at the front of triggerguard) and magazine release buttons are made ambidextrous too. M17s will accept all M16 / Ar-15 type magazines. The top of the carrying handle is fitted with Weaver-style accessory rail which will accept any compatible scope mounts, and also hosts a rudimentary backup open sight.

Armalite AR-18 assault rifle (USA)

original AR-18 assault rifle, made by the Sterling Armaments of UK

the "reincarnated" AR-180B of recent manufacture. Semi-automatic only and with plastic lower receiver with integral pistol grip

Schematic view of the AR-18 (from the original Armalite patent, issued in 1968)

Caliber: 5.56x45 mm (.223 Remington M193)
Action: Gas operated, rotating bolt
Overall length: 940 mm (738 mm with folded stock)
Barrel length: 464 mm
Weight: 3.09 kg with empty 20 rounds magazine
Magazine capacity: 20, 30 or 40 rounds

The AR-18 rifle had been developed by the Armalite company (USA) by the George Sullivan, Arthur Miller and Charles Dorchester in the early 1960s. This rifle was designed for the international military market as a replacement for the AR-15 project, which had been sold to the Colt in 1959 by the Armalite's parent company, Fairchild Aircraft and Engine Corp. The AR-18 was designed as a competitor to the AR-15, which could be made at much less expenses and on simplified machinery, with the view to sell the manufacturing licenses for AR-18 to the third world countries. The AR-18 was a really successful design from a technical standpoint, but it come out too late to compete with both officially accepted and adopted AR-15/M16 rifle of American origin and already widespread AK-47 rifle of the Soviet origin. The Armalite company by itself made very few specimens of this rifle. The manufacturing license was consequently sold to the British company Sterling Armaments Co and to the Japanese company Howa Machinery co, but all three companies produced hardly over 20 000 rifles total, and the production of the AR-18 was ceased circa 1979 for some 20 years. It was originally available in the military AR-18 (selective fire) and AR-18S (selective fire, with short barrel) versions, and in AR-180 semi-automatic only version. But in the year 2001 the Armalite company resurrected the AR-180 design, in somewhat modified form.