How much clearance should a gun case interior leave?

Answer: 20 to 25 mm at each end, about 50 mm total. Below 30 mm the load is angled in and tears the foam.

Is the 1.2 m drop test mandatory?

Answer: Most buyers write it into acceptance, because it covers a slip from the hand and a fall from a vehicle. Demanding 1.5 m usually adds 0.8 kg.

Can a sealed case stay closed for months?

Answer: Yes, but vent it on a schedule. Open the lid every 60 days and check the gasket for hardening.

Answer: PE is cheaper and firmer, which suits fixed slots; EVA recovers better for daily handling.

Does colour affect strength?

Answer: Masterbatch under 2 percent barely matters; above 4 percent notched impact can fall by a tenth.

How to Choose a Gun Case: Five Decision Criteria

Quick answer: Start with how the case will be carried, then set interior length, wall structure and drop rating, sealing with pressure relief, and latch points with marking. Turn each into a number before comparing prices.

Five Decision Criteria for a Gun Case
Carry Method Sets the Case Shape
Interior Length for the Longest Configuration
Wall Structure and Drop Height
Sealing Pressure and Latch Points
FAQ

1. Five Decision Criteria for a Gun Case

This product is not a storage bin; it travels with a person, so the first question is how it leaves the building: one hand, two shoulders, or a car boot. Only then do length, wall and drop rating, sealing and latches fall into order.

Reversing that order costs money: one buyer chose a 1150 mm interior, but the boot measured 1050 mm, so the gun case went in diagonally.

Criterion	Settle this first	Typical value	Cost of getting it wrong
Carry method	Hand, shoulder or vehicle	300 m one-hand carry	Poor balance, sore wrist
Wall and drop	Likely fall height	1.2 m six-face drop	Corner cracks
Latches	Who opens it, how traced	Four latches, matched labels	Handover disputes

2. Carry Method Sets the Case Shape

A hand-carried gun case needs the handle over the centre of gravity, with a 95 to 110 mm grip so a gloved hand still closes on it. Offset it and the wrist pays within 300 m. Static load runs at three times payload.

Gun case: corner close-up of a grey hard case on light grey, fine pebbled texture, vertical side ribs, moulded latch recess

Vehicle use is about the base and the stack. Four anti-slip ribs meeting matching grooves hold lateral offset under 3 mm when two cases ride together, and R8 corners slide between seats without marking trim. Shoulder models need 15 mm of clearance behind the back panel and metal D-rings.

3. Interior Length for the Longest Configuration

Measure the longest configuration, not the bare unit. A folding stock adds 120 to 180 mm when extended, a muzzle device 60 mm, and an optic 45 mm of height. A 1010 x 300 x 135 mm interior takes a 960 mm extended length with 25 mm clearance at each end.

Interior length	Depth	Fits	Case weight
780 mm	110 mm	Folding stock, short build	3.6 kg
1010 mm	135 mm	Standard extended build	4.9 kg
1150 mm	145 mm	Long barrel with optic	5.9 kg

Foam slots run about sixty percent of interior depth: 60 mm in 30 kg/m³ PE, 15 mm walls so nothing snags, and 20 mm of solid material between slots so a drop does not crush neighbours.

4. Wall Structure and Drop Height

Structure beats thickness. A 3.2 mm wall with double-thickness corners and a ring of ribs survives a 1.2 m six-face drop without cracking, while a flat panel of the same thickness whitens at 0.9 m. Ask for the drop report, not the wall figure.

Gun case: a black case corner latch in close-up on a warehouse floor, wooden pallets and roller door behind

The hinge is the second weak point. A 3 mm stainless pin with bushings over seventy percent of the case length still closes square after 20,000 cycles; plastic bushes need checking near 10,000. Polypropylene also loses about forty percent of its impact strength at minus 20 degrees, so cold users need a low-temperature compound or 5 mm of EVA inside.

5. Sealing Pressure and Latch Points

Write the rating with its test conditions: IP67 means one metre of water for thirty minutes, and only if the gasket is compressed and every latch closed. A 55 Shore A gasket resists heat sag and cold stiffening; a 0.35 bar relief valve stops a 40 degree swing from locking the lid.

Latch count and placement belong together. Four latches seal more evenly than two plus a centre catch; the leak rate differs by about thirty percent. They must close one-handed, so the operator knows the gun case is shut.

Item	Common mismatch	Field symptom	Fix
Gasket hardness	70 Shore A specified	Lid will not compress cold	Change to 55
Latch count	Two latches only	Lid bows at mid-span	Move to four

Conclusion

With the criteria reduced to numbers, price comparisons mean something: two cases claim a 1010 mm interior, yet one latch apart changes how the gun case behaves. Fix the carry method and drop height first; everything else about the gun case follows.

This article discusses only the container (case body) side of specifications and design intent, and does not cover any handling, loading or use of the contents.