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Longthorne Gunmakers


Longthorne barrels
Patented Barrel Technology
When we embarked upon the quest to produce a new English shotgun, we realised the need to make it ‘innovative’ and ‘advanced’ while maintaining classic lines. For this reason, in 2006, we thought very carefully about the design and processes from initiation.

Our patented barrels are designed and manufactured in house by a highly innovative method and process. We take a single piece of high specification steel weighing approximately 27 kg and machine the barrels from this single block of steel eventually weighing approximately 1.3kg depending on their length. This has several benefits.

The resulting barrels are not only durable but also light in weight.

In eliminating the need for a heavy soldered centre rib, we can add weight to the barrel wall thickness, which in itself is stronger than the average barrel because of the high specification material we use. Despite its lightweight, our barrels are chambered for 3” (in 12, 16, 20 and 28 bores) and can be proofed for Magnum steel (also known as Fleur De Lys or Superior steel proof) up to full (fixed) choke. We believe that, to date, we are the only gun-making company in the UK (at least) to have achieved this. Not only does this verify the strength of our barrels, but it also renders them 'futureproof' for our Clients.

The small central beam between the barrels measures less than 2mm, and this, combined with the fact that our barrels are honed to a very close tolerance and are perfectly straight not unlike a finely tuned rifle, results in our guns shooting exactly where they are pointed. In contrast to this, many conventional monoblock barrels are constructed from two tubes which are inserted into an angled cavity at the breech end and then ‘pulled’(or ‘pushed’) together and then soldered into position, which in

The most significant feature of our guns is that they have negligible recoil even with the heaviest loads, we quite often demonstrate the gun's capacity using 50 gram 4's, this is attributable significantly because of our barrel design, but also our low profile action and general rigidity of our guns, this can also minimalise 'muzzle flip'.

We can tailor the barrel length and the top rib to your requirements during the manufacturing process and can incorporate a rib more suited to game or clay shooting, whichever you prefer, we are also able to adjust the weight of our guns while maintaining balance.

We are also able to use a ‘hot’ process to blacken our barrels because there are no soldered ribs and therefore no ‘seepage’ of chemicals which can cause premature rusting of soldered joins. This process is more resilient than the cold blacking process so often used on fabricated barrels and creates a beautiful blue/black sheen.

As our barrels are so close together at the breech end, any degree of convergence is minimal to ensure consistent point of aim and point of impact.

Eliminating the centre rib also allows any heat to disperse more evenly and quickly, we don’t need a vented rib because there is no trapped hot air causing heat ‘build-up’.

Our barrels manufactured from a much harder material than conventional barrels (such as EN19 or EN24 for example), therefore, they are much less likely to ‘dent’ in the event of an accident, however, should a small calamity occur, dents can usually be ‘raised’ in the usual manner but without having to remove the ribs.

Our theories aren’t new, and the renowned engineer Sir Joseph Whitworth (of ‘Whitworth’ thread fame) recognised the benefits and patented barrels manufactured from a single piece of steel in 1857, unfortunately, at that time the manufacturing methods were expensive in comparison to labour costs of the day and cumbersome in comparison to today’s available technology, and so the fabricated method of making barrels prevailed at that time.

We actively encourage shooters to try our guns for themselves. Please contact us if you would like to arrange this, it would be our pleasure to meet you.

Longthorne Guns


By Car: We are about 10 minutes from junction 16 M1 in the centre of Northampton.

By Train: The closest station is about 5 minutes away (Northampton) and we can pick you up from the station by prior arrangement.

By Air:  The Closest airports are Luton (41 mls) Birmingham International (46 mls) Heathrow (70 mls) Stanstead (89 mls) Gatwick (105 mls)


Longthorne House, 1 Millbrook Close
Northampton NN5 5JF

+44 (0) 1772 811215

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