The L1A1 and C1A1 standard rifles were not designed for bipods, but the Aussie L2A1 and Canadian C2A1 automatic rifle variants (select fire) were made with heavy barrels and had bipods incorporated into their design.  (The Brits did not use an automatic rifle version of their L1A1; instead, they used a 7.62 conversion of the Bren gun called the L4A4.)  If you wanted one of these AR types, you'd need to fit your rifle with the specialized carrying handle, heavy barrel, and specialized gas block that carries the bipod legs (with attached wooden handguards).  This can be a very expensive proposition.

 

The standard handguards of metric and Commonwealth rifles are can be swapped as assemblies, but pistol grips and butt stocks cannot due to differences in the metric and inch pattern lower receivers.

 

The L1A1 or C1A1 inch pattern barrel does not have the second ring for a bipod to mount to the barrel itself -- the first ring is for the mounting of the front sling swivel -- and although you could mount a metric FAL light bipod on the inch barrel using "bipod cut" metric handguards, the bipod itself would tend to shift forward due to the lack of a stop cut on the barrel.

 

A better solution is to mount an after market bipod to the handguards themselves.  Hanging a bipod on the barrel can cause dispersion (or shift in bullet strike).  Hangining a bipod on the handguards tends to prevent this.  If you go to on-line sources like www.sportsmansguide.com or www.cheaperthandirt.com they have various aftermarket bipods.  Sportsman's Guide has a lightweight bipod for about $29.95 that takes a button-type mounting stud (like for a Harris bipod) or one that mounts directly to the forearm or handguard.  The bipod legs are fixed and come in either 6-inch or 9-inch height (I recommend the higher of the two).

 

An alternative solution would be to go to the Versa-Pod website.  What you can do is install one of the Mil-Std-1913 rails with a sling swivel (designed for the M14 rifle) on your hanguard.  Versa-pod makes a bipod mount attachment that clamps to this rail.  The bipod itself attaches to the mount and can be easily removed when not in use.  The Versa-pod bipod (a reverse-engineered Parker-Hale bipod) is ajdustable for height, folds forward or backward under the rifle when not in use, adjusts for uneven terrain, and has a limited amount of traverse.  I would recommend the Versa-Pod setup for you.  If you need further help, send me a personal message at [email protected] and we can discuss this in greater detail.