L1A1 Specifications

Following the lead of my hero, OldNFO, here’s some specifications for your ponderage (new word).

The L1A1 is the British variant of the Fabrique Nationale FN-FAL rifle. The original FN-FAL was based on metric measurements. Of course, the British Empire would have none of that, and modified the rifle to comply with their Inch Pattern. During the original FN-FAL design, there were a number of calibers tested, including .270 and .280, but finally settling on the 7.62×51 NATO round.

My rifle (this is my rifle, this is my gun…) is a bastardized Century Arms model made mumble-years ago. Century Arms was not known at that time to put together a great set of parts, and mine is one of those. I’ve gotten it pretty well beaten into shape and enjoy pushing a large round downrange semi-automatically. The action soaks up  a large amount of the recoil, unlike a bolt-action rifle, and makes for a pleasant firing. Now, if there were a better trigger…

OK. The specs, courtesy of Blake Stevens’ “UK and Commonwealth FALS” (Collector Grade Publications, 1987):

Calibre: 7.62mm (.30 in)

Length of Rifle (with normal butt): 1143 mm (45 in)

Length of barrel  533.4 mm (21 in)

Number of grooves: 6

Pitch of rifling:  1 turn in 304.8 mm (12 in)

Twist of rifling: right hand

Type of operation: Gas

Weights –

Rifle only:  4337.4 gm (9.56 lb)

Rifle and full magazine: 5074.4 gm (11.19 lb)

Magazine full: 737 gm (1.6 lb)

Magazine empty: 255 gm (9 oz)

Magazine capacity: 20 rds (standard)

Sights –

Fitted, Rear:  Aperature

Fore:  Blade

Sight Range:  200-600 m

Sight Radius:  55.37 cm (21.8 in)


Ammunition: (source Wikipedia 7.62×51 NATO)

Parent case .308 Winchester (derived from the .300 Savage)
Case type Rimless, Bottleneck
Bullet diameter 0.308 in (7.82 mm)
Neck diameter 0.345 in (8.8 mm)
Shoulder diameter 0.454 in (11.5 mm)
Base diameter 0.470 in (11.9 mm)
Rim diameter 0.473 in (12.0 mm)
Rim thickness 0.050 in (1.3 mm)
Case length 2.015 in (51.2 mm)
Overall length 2.750 in (69.9 mm)
Rifling twist 1 in 12 in (30 cm)
Primer type Large Rifle
Maximum pressure 60,191 psi (415.00 MPa)
Ballistic performance
Bullet weight/type Velocity Energy
147 gr (10 g) M80 FMJ 2,733 ft/s (833 m/s) 2,437 ft·lbf (3,304 J)
175 gr (11 g) M118 Long Range BTHP 2,580 ft/s (790 m/s) 2,586 ft·lbf (3,506 J)
Test barrel length: 24 inches (61 cm)
Source(s): M80: Slickguns,[1] M118 Long Range: U.S. Armorment[2]

Next up, MSAR STG-556 (if I can find the specs). If not, then the Steyr AUG that the MSAR was cloned from.

Suck it, ITAR!

Enjoy, and see y’all at the range!


2 Responses to L1A1 Specifications

  1. Avatar Old NFO
    Old NFO says:

    That’s a nice rifle too! 🙂

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