Quick answer: Cost differences in heavy duty military plastic gun case wholesale come down to rotomoulded wall thickness and lengthwise stiffness. On a 1250 mm case, a 6.0 mm wall, 8.0 mm corners and two mid-span compression points hold deflection under 3 mm at a 60 kg centre load and keep the 25 kg net weight. Drop the wall to 4.5 mm and deflection doubles, with the gasket losing the middle first.
Table of contents
- Rotomoulded shells and lengthwise stiffness
- Wall distribution and the 25 kg net weight
- Five latches and sealing a long case
- Foam layout and three-point support
- Bulk delivery: pallets, stacking and freight
- FAQ
1. Rotomoulded shells and lengthwise stiffness
Most heavy duty military plastic gun case wholesale programs use rotomoulding, and lengthwise stiffness is the first number to fix. Take a 1250×380×180 mm cavity: 6.0 mm PE wall, 8.0 mm corners, three cross ribs at 300 mm pitch on the lid and two lengthwise ribs in the base. Load 60 kg at mid-span for 24 hours and the case bends under 3 mm; past 5 mm the lid seam opens 0.8 mm at the middle and water enters there first.
| Part | Thickness | Structure | Limit |
|---|---|---|---|
| Wall | 6.0 mm | One-piece rotomoulded, no seam | 80 kg side load, no bulge |
| Corner | 8.0 mm | R15 radius | 1.2 m drop, no crack |
| Lid | 6.0 mm | Three cross ribs at 300 mm | 3 mm mid-span bend |
| Base | 6.5 mm | Two lengthwise ribs plus feet | 60 kg flat load |
| Latch seat | 10 mm local | φ6 mm stainless pin | 8000 cycles |
Rotomoulding and injection moulding separate on long cases. An injection tool for a 1250 mm body needs over 800 t of clamp force and triples tooling cost; a rotomoulding tool is welded aluminium sheet, and 200 units covers it. The trade is ±0.8 mm walls and 1.2 kg of drift between batches.
2. Wall distribution and the 25 kg net weight
The unit weight of a heavy duty military plastic gun case wholesale build is walls plus ribs plus hardware. On a 1250×380×180 mm body with PE at 0.94 g/cm³, a 6.0 mm wall and 6.5 mm lid and base, the moulded shell weighs about 21 kg; five latches and hinge pins add 2.4 kg, handles and feet 1.6 kg, for 25 kg, matching the net weight printed on the case.
| Component | Quantity | Unit weight | Total |
|---|---|---|---|
| Rotomoulded shell | 1 | 21.0 kg | 21.0 kg |
| Latches | 5 | 0.32 kg | 1.6 kg |
| Hinge pins | 2 | 0.40 kg | 0.8 kg |
| Handles | 2 | 0.55 kg | 1.1 kg |
| Feet | 4 | 0.12 kg | 0.5 kg |
A 25 kg case should stay under 40 kg loaded. Past 45 kg, two people lifting it onto a tailgate put far more torque through the wrist and drop rates climb; that is why the 1250 mm size outsells the 1500 mm size in wholesale orders. A 7.0 mm wall adds 2.8 kg for 12% more stiffness; one extra cross rib does better for less.
3. Five latches and sealing a long case
Latch count on a heavy duty military plastic gun case wholesale build follows length. At 1250 mm, fit five: three on the front and one on each side, 150 N holding force each, 750 N total. With only three, the 400 mm span between latches opens 1.2 mm after a drop and the gasket cannot follow.
Sealing a long case needs staged compression: a 6.0 mm wide, 5.0 mm deep groove with a 5.8 mm silicone cord at 26%, plus a compression point every 300 mm to pull the bow back. Ends-only latches leak 3 to 5 mL after 30 minutes at 1 m; staged compression brings that under 0.5 mL.
| Length | Latches | Mid compression points | Total holding force | 1 m, 30 min |
|---|---|---|---|---|
| 800 mm | 3 | 1 | 450 N | Dry |
| 1250 mm | 5 | 2 | 750 N | Dry |
| 1500 mm | 6 | 3 | 900 N | Dry |
| 1250 mm reduced | 3 | 0 | 450 N | 3 to 5 mL |
4. Foam layout and three-point support
Foam in a heavy duty military plastic gun case wholesale build supports long items at three points, never two: EVA at 35 kg/m³ and 25 mm thick, placed 150 mm from each end and at the centre, 400 mm apart. With ends only, the 900 mm span sags 6 mm in a drop and creases the pocket floor.
Cut pocket depth to 70% of item thickness with 1.5 mm interference. Under 1 mm the long item slides 3 to 5 mm in transit and the end faces rub bright; over 2.5 mm the whole insert has to be lifted out to retrieve anything. A 20 mm convoluted pad in the lid holds vertical travel under 1 mm.
5. Bulk delivery: pallets, stacking and freight
Delivery damage in heavy duty military plastic gun case wholesale is decided by stacking. A 1200×1000 mm wooden pallet takes four cases per layer and five layers, 20 cases at 500 kg, with 5 mm corrugated board between layers, two straps and stretch film. At six layers the bottom lid dishes 2.2 mm, past the 1.5 mm limit.
Freight is booked by volume. One 1250×380×180 mm case is about 0.086 m³, so a 20 ft container takes 96 cases with pallets and a 40 ft high cube takes 208; loose loading adds 12% but costs 40 extra minutes at each end and lifts damage from 0.8% to 2.5%. Plan 30 days, including 7 days for the rotomoulding tool, 5 for samples and 18 for the first run.
The ends take the damage. Leave a 20 mm buffer at each end and fit corner protectors; after 1200 km of road freight, paint loss at the ends should stay under 5 mm². Pallets without protectors show white marks at almost every unload.
Conclusion
The order is: latch count and mid compression points from length, wall and ribs from stiffness, support points from the item outline, pallets and corner protectors from the shipping distance. Mid compression is the first item cut and the first one the immersion test finds.
This article covers container-side specifications and design implications only.
Related Reading
- Gun case selection and size classes
- Structure and handling of long cases
- Custom military equipment cases and tooling
- What a gun case production audit covers
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